STRESS AND WORKLOAD
Preventive brain health in organisations: why a gym benefit alone is not enough
Most Finnish expert organisations already have a fitness benefit, an occupational health contract and some form of wellbeing programme. Mental health based sickness absence has nevertheless remained a central concern. This contradiction does not mean the benefits are useless. It means a benefit influences individual behaviour outside work, while load is generated by the structure of work during working hours.
NeuroAudit® Ltd. defines preventive brain health in an organisation through three conditions: load is measured, structure is changed on the basis of that measurement, and the change is followed up. If any one of these is missing, the activity is wellbeing communication rather than prevention. The difference shows in the results.
Why a single benefit does not change the load structure
Physical activity is exceptionally well documented for brain health. Meta-analytic evidence shows an association between high physical activity and substantially lower dementia risk (Hamer & Chida 2009), and the relationship between activity and brain structure and function has also been shown in large population data (Raichlen et al. 2020). Offering physical activity is therefore justified.
The problem is targeting. A benefit affects those who use it, and use is typically lowest among those whose load is highest. When the workday is filled with meetings and interruptions, using the benefit requires additional self-regulation, precisely the resource that load has made scarce.
The second problem is mechanism. Work load affects cognition through its own pathways: high job strain is prospectively associated with cognitive decline (Singh-Manoux et al. 2016), and burnout is associated with measurable decline, particularly in executive function (Gavelin et al. 2021). Exercise does not remove these exposures, it only improves tolerance of them.
What is known about chronic load at the mechanism level
Allostatic load describes the price the body pays for continuous adaptation to changing demands (McEwen & Akil 2020). The concept is useful because it explains why load is not harmless even when a person copes with it.
For cortisol the evidence is dose dependent. Serum cortisol is inversely related to hippocampal volume (Frontiers in Aging Neuroscience 2023), the association of social stress and the cortisol awakening response with grey matter volume has been examined in more recent data (PMC 2025), and high cortisol is linked to the risk of dementia and Alzheimer’s disease (Ouanes & Popp 2019) and to hippocampal atrophy (White et al. 2023).
The effect of stress hormones is not limited to structure. Stress hormones alter brain network function and the formation of emotional memory (Yale 2025). Chronic stress has also been examined as a trigger of Alzheimer’s pathology (Ávila-Villanueva et al. 2020), and the relationship between stress and dementia risk has been summarised in a narrative review (Chaudhuri 2025).
Prevention works when it is multidomain
The strongest evidence for prevention comes from Finland. The FINGER trial showed that a two year multidomain intervention combining nutrition, exercise, cognitive training and vascular risk monitoring improved cognitive performance compared with general health advice (Ngandu et al. 2015). Persistence of benefits has been examined in a seven year extended follow-up (Lehtisalo et al. 2023), and the overall picture of multidomain trials has been assessed separately (Solomon et al. 2018).
The essential feature of the result is multidomain design. A single component did not produce an effect of the same magnitude, but the combination did. This is a direct answer to the limits of a fitness benefit: the issue is not that exercise is ineffective, it is that one measure cannot change the whole.
International guidance points the same way. WHO guidelines on reducing the risk of cognitive decline and dementia (WHO 2023) address several simultaneous risk factors, and the updated Lancet Commission risk factor analysis (Livingston et al. 2024) shows that a substantial share of risk is modifiable.
Workplace cognitive ergonomics is a concrete instrument
Finland has practical intervention evidence on workplace level cognitive ergonomics. In the SujuKE project of the Finnish Institute of Occupational Health, cognitive ergonomics practices were introduced into workplaces and their feasibility and effects were assessed. Comparable development work has been carried out in nursing, where sources of cognitive load are especially visible.
A work redesign model gives an organisation a structure for adjusting load at individual level without it becoming special treatment. This matters, because tolerance for load varies with life situation, health status and hormonal stage.
These materials are Finnish, public and available. That is relevant for leadership: cognitive ergonomics measures do not need to be justified with general international references, they can be justified with domestic working life research.
What a preventive programme contains in practice
A working programme is distinguished from wellbeing communication by the fact that it changes the structure of work and measures the change. The following frame is implementable without a new organisation.
- A baseline measurement for the whole staff or a representative sample. Without a baseline no effect can be demonstrated and no resources can be targeted.
- Identification of the load bottleneck at unit level. The same total score can arise from sleep, interruptions or recovery, and the correction differs in each case.
- A structural change to at least one identified bottleneck: meeting practice, protected time, communication channel discipline or work redesign.
- Coaching for line managers in recognising load. A manager sees the change in performance before it appears in absence figures.
- A follow-up measurement after 3 or 6 months. Without follow-up the programme is a campaign, not prevention.
The business case is direct
Cognitive reserve is a modifiable property that protects performance under load (Stern et al. 2020), and its significance across the life course has been examined more broadly (Livingston et al. 2024). From an organisational perspective, reserve means the ability to preserve decision quality when the situation is difficult. That is exactly when the value of decisions is highest.
On the other side is the cost. The development of mental health based sickness absence has been a central monitored phenomenon in Finnish working life, and established instruments exist for assessing burnout. The price of an absence is not limited to the days absent, because returning to full productive capability takes time of its own.
The summary is simple: a fitness benefit affects individual tolerance, structural change affects exposure. Both are needed, but only the latter changes what happens at work.
Three metrics worth tracking in parallel
A single metric misleads, because brain health is not a one dimensional phenomenon. A combination of three parallel metrics gives a sufficient picture without heavy monitoring machinery.
The first is a leading load indicator that reports the state of capacity before it appears in results. The second is a structural metric: how many experts got at least two uninterrupted work blocks last week. The third is a lagging metric, absence and turnover, which confirms or refutes the signal from the first two.
The logic of three metrics is the same as in finance: cash flow, order book and profit report different things with different lags. In brain health, relying on a lagging metric alone means the corrective move is made only after the damage has occurred.
The most common pitfalls and how to avoid them
Preventive programmes rarely fail on content. They fail on execution, and the failure modes repeat from one organisation to the next.
- The programme starts without a baseline. Without a baseline no effect can be demonstrated, so funding is cut in the first round of savings.
- Measures are offered identically to everyone. The bottleneck is unit specific, and the same measure is useless for one unit and decisive for another.
- Line managers are not coached. A manager sees the change in performance before it appears in absence figures, but only if they know what to look at.
- Results are not brought to the leadership team as numbers. Whatever is not reported in the same format as other key figures disappears from the agenda.
- Individual data and organisational reporting get mixed. If a respondent suspects the data reaches their manager, answers are distorted and the whole measurement loses its value.
Key findings
Prevention is distinguished from wellbeing communication by the fact that it changes structure and measures the change. A summary for leadership.
- A benefit affects individual tolerance, structural change affects exposure. Both are needed.
- The strongest prevention evidence comes from multidomain interventions, not from single measures (Ngandu et al. 2015).
- The mechanisms of chronic load are dose dependent and documented (McEwen & Akil 2020; Ouanes & Popp 2019).
- Without a baseline measurement no effect can be shown and no programme can be defended in a savings round.
- Organisational reporting must be anonymous and aggregated, otherwise answers are distorted and the instrument loses its value.
Measure first, then build the programme
The most common mistake in preventive work is to start from measures. The organisation then selects a solution before the problem has been defined, and the outcome is often the right measure aimed at the wrong bottleneck.
The NeuroAudit™ Method produces a Neuro Performance Index (NPI™) value and decomposes load into a twelve pillar structure at both individual and organisational level. Organisational reporting is anonymous and aggregated, so it provides the information leadership needs without individual health data reaching the employer. Prevention then becomes a managed process rather than a well-meaning campaign.
